首页|Ternary alloy and metal oxides embedded in yolk-shell polyhedrons as bifunctional oxygen electrocatalyst

Ternary alloy and metal oxides embedded in yolk-shell polyhedrons as bifunctional oxygen electrocatalyst

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To improve the efficiency of oxygen electroly-sis,exploiting bifunctional electrocatalysts with excellent activity and stability is extremely important due to the four-electron transfer dynamics of oxygen evolution reac-tion(OER)and oxygen reduction reaction(ORR).Herein,a series of yolk-shell hollow polyhedrons(YHPs)embed-ded with NiCoFe ternary alloy and metal oxides,which are named YHP-x(x=1,2,3,4),were reported.By controlled etching multi-layered zeolitic imidazolate frameworks and following pyrolytic integration,YHPs are endowed with mass transfer tunnels,accessible inner active sites,and good electrical conductivity.Due to the synergetic effect of the alloy,metal oxides and the yolk-shell structure,YHP-1 exhibits excellent ORR performance with a half-wave potential of 0.79 V and YHP-2 displays superior OER performance with a low overpotential of 257 mV at 10 mA cm-2.The strategy described in this work can be extended to a number of hollow/yolk-shell electrocatalysts for water splitting and metal-air batteries.

Metal oxides and alloyOxygen evolutionOxygen reductionYolk-shell polyhedron

Yi Zhang、Jia-Dan Lu、Guang-Xun Zhang、Rong-Mei Zhu、Huan Pang

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Institute for Innovative Materials and Energy,School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225009,China

Program for the National Natural Science Foundation of ChinaProgram for the National Natural Science Foundation of ChinaProgram for the National Natural Science Foundation of ChinaProgram for the National Natural Science Foundation of China江苏省自然科学基金Changjiang Scholars Program of the Ministry of EducationTop Talent Project of Yangzhou University

NSFC-219012212167117021673203U1904215BK20190870Q2018270

2024

10.1007/s12598-023-02485-9

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(2)
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